100 Watt Marshall Amp Flashing

[dumbassbob]

I bought some Valve Art EL-34 from China,My amp sounded OK I started useing a Attenuator for 2-3 days every thing was fine.A little while ago I started hearing funny little howling sounds...Tubes 1 and 2 are flashing Blue,When I changed them around 3 and 4 to 1 and 2 they ALL flashed blue.Did I pop a swamp resistor or the tubes.

[soundguruman]

You probably burned the tube sockets, from playing the amp into the wrong impedance speakers.
An attenuator tends to do that too. Your load was not matched to the amp.
So, stop playing and get it repaired. There's high voltage in there, even after it's unplugged.

[dumbassbob]

I did its a 8 ohm reactive load like a Marshall SE100 But I used a 16 ohm cab I didn't think it wound hurt. The owners manual said it could go down to 2 ohms My other Cab is my Bandmaster 4 ohm What do you think I popped in there Those 5 watt grids?

[dumbassbob]

I am so stupid..

[soundguruman]

Happens to everybody, once. After that you remember....or pay.

I am the stupidist however, so don't feel bad:
When I was 11, I had a tube amp, an Alamo Combo Amplifier.
I discovered that by connecting a diode across the speaker, it made the coolest fuzz tone.
However, after I paid to replace the output transformer, the idea did not seem so cool anymore.
So, don't feel stupid, just remember how stupid I was to my Alamo...and then you will lyao.

When connecting an amp (especially a Marshall) to a speaker, you need to match the impedance carefully.
If the amp is set 8 ohms, you better connect it to 8 ohms. It's more important than most will realize.
If you fail to observe that, you can blow the tubes, fuses, or the transformers. I am not making this up.

Also, don't ever use a guitar cable to hook up a speaker. The guitar cable is shielded. A Marshall hates that.
That guitar cable can cost you the output transformer! Boom , it's dusted. I have actually seen this happen, in person.

A speaker Cable is two wires, with no shielding. You should use one, without hesitation.
The connections on the plugs better not be lose. All the connections have to be tight and solid.

So anyhow, using the wrong impedance speaker can cause the tube sockets to arc.
After it arcs, it leaves a carbon track on the socket and the carbon keeps burning and burning, etc...
or the tubes can blow, etc...

So it's critical that the speaker match up to the amp, and that the impedance is right.
And it's critical that the speaker is in good condition....

[dumbassbob]

Happens to everybody, once. After that you remember....or pay.

I am the stupidist however, so don't feel bad:
When I was 11, I had a tube amp, an Alamo Combo Amplifier.
I discovered that by connecting a diode across the speaker, it made the coolest fuzz tone.
However, after I paid to replace the output transformer, the idea did not seem so cool anymore.
So, don't feel stupid, just remember how stupid I was to my Alamo...and then you will lyao.

When connecting an amp (especially a Marshall) to a speaker, you need to match the impedance carefully.
If the amp is set 8 ohms, you better connect it to 8 ohms. It's more important than most will realize.
If you fail to observe that, you can blow the tubes, fuses, or the transformers. I am not making this up.

Also, don't ever use a guitar cable to hook up a speaker. The guitar cable is shielded. A Marshall hates that.
That guitar cable can cost you the output transformer! Boom , it's dusted. I have actually seen this happen, in person.

A speaker Cable is two wires, with no shielding. You should use one, without hesitation.
The connections on the plugs better not be lose. All the connections have to be tight and solid.

So anyhow, using the wrong impedance speaker can cause the tube sockets to arc.
After it arcs, it leaves a carbon track on the socket and the carbon keeps burning and burning, etc...
or the tubes can blow, etc...

So it's critical that the speaker match up to the amp, and that the impedance is right.
And it's critical that the speaker is in good condition....

I did every thing right But used the 16 ohm cab I have at 4ohm but thought that was to low. If I don't see burn marks Do you think I might of just burned the tubes up they where brand new Valve Arts and the guy told me just to send them back and he would replace or should I still go to a tech If I knew what to do or test with a DMM Hoping I got off lucky

[dumbassbob]

The speaker jack was loose also... man dumbassbob